Abstract: A theoretical model of wavelength conversion based on Sum-Frequency GenerationQuasiphase-Matched in nonlinear medium with periodically structure is established. For example, AlGaAs, using this model, the simulation of the numerical value relationship of device length and conversion efficiency for different transmission loss is given, as well as the relationship of pump power and conversion wavelength power. Results show that pump power, transmission loss and device length are main factors in the process of conversion.

Key words: fiber communications, wavelength conversion, sum-frequency generation